Philippines. Regional Development Council. (1985). Ilocos Norte-Laoag City development profiles, CY 1985. National Economic Development Authority.
Chicago-referens (17:e uppl.)Philippines. Regional Development Council. Ilocos Norte-Laoag City Development Profiles, CY 1985. San Fernando, La Union: National Economic Development Authority, 1985.
MLA-referens (9:e uppl.)Philippines. Regional Development Council. Ilocos Norte-Laoag City Development Profiles, CY 1985. National Economic Development Authority, 1985.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.